Update dependency @vue/test-utils to v2

Author: renovate[bot]

package.json

@@ -33,7 +33,7 @@
     "@vue/cli-service": "4.5.19",
     "@vue/eslint-config-airbnb": "5.3.0",
     "@vue/eslint-config-typescript": "7.0.0",
-    "@vue/test-utils": "1.3.6",
+    "@vue/test-utils": "2.4.6",
     "bulma": "0.9.4",
     "eslint": "7.32.0",
     "eslint-plugin-import": "2.32.0",